The first decade of the 21st century ______ breathtaking, non-stop development in China.
Rather than ________ on a crowded bus , he always prefers ________ a bicycle.
When he came back, his wife was found _________.
Every minute should be made the most of ________ our lessons well.
Our English teacher recommended that we ________ an English dictionary.
I don’t think he is right, ________?